Writing instrument



FIG. 1 is a bottom front perspective view of a writing instrument showing our new design;

FIG. 2 is a top front perspective view thereof in an exploded condition;

FIG. 3 is a front elevational view thereof, the rear view being identical thereto;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front elevational view thereof with the cap member removed, the rear view being identical thereto;

FIG. 9 is a right side elevational view of FIG. 8;

FIG. 10 is a left side elevational view of FIG. 8; and,

FIG. 11 is a top plan view of FIG. 8. 

The ornamental design for a writing instrument, as shown and described. 